Section. 4.
The Times, Places and Manner of holding Elections for Senators and Representatives, shall be prescribed in each State by the Legislature thereof; but the Congress may at any time by Law make or alter such Regulations, except as to the Places of chusing Senators.
The clear implication above is that state legislatures establish “Times, Places and Manner” separate from the normal legislative proces of the state and are constrained only by the state constitution that established it and federal lawwhen the US congress chooses to intervene in state election law. The “Times, Places and Manner” of federal elections in the states are not part of the legislative process and, thus, not subject to the normal judicial review process.